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# AVMetadataIdentifier

A structure that defines identifiers for metadata formats.

```
struct AVMetadataIdentifier
```

## Topics

### Common metadata identifiers

[`commonIdentifierAccessibilityDescription`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierAccessibilityDescription)

An identifier that represents the accessibility description for the media.

[`commonIdentifierAlbumName`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierAlbumName)

An identifier that represents the name of the album.

[`commonIdentifierArtist`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierArtist)

An identifier that represents the name of the artist.

[`commonIdentifierArtwork`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierArtwork)

An identifier that represents an image relating to the album.

[`commonIdentifierAssetIdentifier`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierAssetIdentifier)

An identifier that represents the asset ID for the media.

[`commonIdentifierAuthor`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierAuthor)

An identifier that represents the name of the author.

[`commonIdentifierContributor`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierContributor)

An identifier that represents the name of the contributor.

[`commonIdentifierCopyrights`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierCopyrights)

An identifier that represents the copyright statement.

[`commonIdentifierCreationDate`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierCreationDate)

An identifier that represents the date of the original recording.

[`commonIdentifierCreator`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierCreator)

An identifier that represents the name of the creator.

[`commonIdentifierDescription`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierDescription)

An identifier that represents the description of the media.

[`commonIdentifierFormat`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierFormat)

An identifier that represents the file format of the media content.

[`commonIdentifierLanguage`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierLanguage)

An identifier that represents the language of the text or lyrics spoken or sung in the audio.

[`commonIdentifierLastModifiedDate`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierLastModifiedDate)

An identifier that represents the last modification date of the media.

[`commonIdentifierLocation`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierLocation)

An identifier that represents the location information for the media.

[`commonIdentifierMake`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierMake)

An identifier that represents the name of the camera maker.

[`commonIdentifierModel`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierModel)

An identifier that represents the name of the camera model.

[`commonIdentifierPublisher`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierPublisher)

An identifier that represents the name of the publisher.

[`commonIdentifierRelation`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierRelation)

An identifier that represents the relation information for the media.

[`commonIdentifierSoftware`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierSoftware)

An identifier that represents the name of the software used to create the media.

[`commonIdentifierSource`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierSource)

An identifier that represents the source information for the media.

[`commonIdentifierSubject`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierSubject)

An identifier that represents the subject information for the media.

[`commonIdentifierTitle`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierTitle)

An identifier that represents the title of the media.

[`commonIdentifierType`](/documentation/AVFoundation/AVMetadataIdentifier/commonIdentifierType)

An identifier that represents the media type.

### iTunes metadata identifiers

[`iTunesMetadataAccountKind`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataAccountKind)

An identifier that represents the kind of iTunes account.

[`iTunesMetadataAcknowledgement`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataAcknowledgement)

An identifier that represents the acknowledgement information in iTunes.

[`iTunesMetadataAlbum`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataAlbum)

An identifier that represents the name of the album in iTunes.

[`iTunesMetadataAlbumArtist`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataAlbumArtist)

An identifier that represents the artist for the album.

[`iTunesMetadataAppleID`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataAppleID)

An identifier that represents an Apple ID.

[`iTunesMetadataArranger`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataArranger)

An identifier that represents the name of the arranger.

[`iTunesMetadataArtDirector`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataArtDirector)

An identifier that represents the name of the art director.

[`iTunesMetadataArtist`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataArtist)

An identifier that represents the name of the artist.

[`iTunesMetadataArtistID`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataArtistID)

An identifier that represents the ID for an artist.

[`iTunesMetadataAuthor`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataAuthor)

An identifier that represents the name of the author.

[`iTunesMetadataBeatsPerMin`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataBeatsPerMin)

An identifier that represents the beats per minute of a track in iTunes.

[`iTunesMetadataComposer`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataComposer)

An identifier that represents the name of the composer.

[`iTunesMetadataConductor`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataConductor)

An identifier that represents the name of the conductor.

[`iTunesMetadataContentRating`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataContentRating)

An identifier that represents the content rating in iTunes.

[`iTunesMetadataCopyright`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataCopyright)

An identifier that represents the copyright statement in iTunes.

[`iTunesMetadataCoverArt`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataCoverArt)

An identifier that represents an album cover image.

[`iTunesMetadataCredits`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataCredits)

An identifier that represents the credits for the source content.

[`iTunesMetadataDescription`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataDescription)

An identifier that represents the description information in iTunes.

[`iTunesMetadataDirector`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataDirector)

An identifier that represents the name of the director.

[`iTunesMetadataDiscCompilation`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataDiscCompilation)

An identifier that represents whether an album is a compilation of tracks in iTunes.

[`iTunesMetadataDiscNumber`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataDiscNumber)

An identifier that represents the disc number of a multi-CD album in iTunes.

[`iTunesMetadataEncodedBy`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataEncodedBy)

An identifier that represents the person or organization responsible for encoding the media.

[`iTunesMetadataEncodingTool`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataEncodingTool)

An identifier that represents the software or hardware and settings used for encoding.

[`iTunesMetadataEQ`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataEQ)

An identifier that represents the equalizer preset option in iTunes.

[`iTunesMetadataExecProducer`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataExecProducer)

An identifier that represents the name of the executive producer.

[`iTunesMetadataGenreID`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataGenreID)

An identifier that represents the genre ID.

[`iTunesMetadataGrouping`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataGrouping)

An identifier that represents additional grouping information for an album.

[`iTunesMetadataLinerNotes`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataLinerNotes)

An identifier that represents the digital booklet for an album.

[`iTunesMetadataLyrics`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataLyrics)

An identifier that represents the lyrics in the recording.

[`iTunesMetadataOnlineExtras`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataOnlineExtras)

An identifier that represents the extra materials for an album.

[`iTunesMetadataOriginalArtist`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataOriginalArtist)

An identifier that represents the name of the original artist.

[`iTunesMetadataPerformer`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataPerformer)

An identifier that represents the name of the performer.

[`iTunesMetadataPhonogramRights`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataPhonogramRights)

An identifier that represents the phonogram rights statement.

[`iTunesMetadataPlaylistID`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataPlaylistID)

An identifier that represents the playlist ID.

[`iTunesMetadataPredefinedGenre`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataPredefinedGenre)

An identifier that represents the predefined genre.

[`iTunesMetadataProducer`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataProducer)

An identifier that represents the name of the producer.

[`iTunesMetadataPublisher`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataPublisher)

An identifier that represents the name of the publisher.

[`iTunesMetadataRecordCompany`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataRecordCompany)

An identifier that represents the name of the record company.

[`iTunesMetadataReleaseDate`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataReleaseDate)

An identifier that represents the release date for the original recording.

[`iTunesMetadataSoloist`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataSoloist)

An identifier that represents the name of the soloist.

[`iTunesMetadataSongID`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataSongID)

An identifier that represents the song ID.

[`iTunesMetadataSongName`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataSongName)

An identifier that represents the name of the song in iTunes.

[`iTunesMetadataSoundEngineer`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataSoundEngineer)

An identifier that represents the name of the sound engineer.

[`iTunesMetadataThanks`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataThanks)

An identifier that represents the thanks statement in iTunes.

[`iTunesMetadataTrackNumber`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataTrackNumber)

An identifier that represents the order number in iTunes.

[`iTunesMetadataTrackSubTitle`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataTrackSubTitle)

An identifier that represents the information relating to the contents title.

[`iTunesMetadataUserComment`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataUserComment)

An identifier that represents a user comment regarding the content.

[`iTunesMetadataUserGenre`](/documentation/AVFoundation/AVMetadataIdentifier/iTunesMetadataUserGenre)

An identifier that represents the genre set by a user in iTunes.

### QuickTime metadata identifiers

[`quickTimeMetadataAIMEData`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataAIMEData)

A value of type kCMMetadataBaseDataType_RawData

[`quickTimeMetadataAccessibilityDescription`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataAccessibilityDescription)

An identifier that represents the accessibility description for the movie file content.

[`quickTimeMetadataAlbum`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataAlbum)

An identifier that represents the name of the album or collection in QuickTime.

[`quickTimeMetadataArranger`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataArranger)

An identifier that represents the name of the arranger of the movie file content.

[`quickTimeMetadataArtist`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataArtist)

An identifier that represents the name of the artist of the movie file content.

[`quickTimeMetadataArtwork`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataArtwork)

An identifier that represents an image relating to the movie file content.

[`quickTimeMetadataAuthor`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataAuthor)

An identifier that represents the name of the author of the movie file content.

[`quickTimeMetadataAutoLivePhoto`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataAutoLivePhoto)

An identifier that represents whether the live photo movie used auto mode.

[`quickTimeMetadataCameraFocalLength35mmEquivalent`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataCameraFocalLength35mmEquivalent)

A value of type kCMMetadataBaseDataType_UTF8 indicating focal length normalized to the 35mm film equivalent value (e.g. “50.00mm”).

[`quickTimeMetadataCameraFrameReadoutTime`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataCameraFrameReadoutTime)

An identifier that represents the camera frame readout time in QuickTime.

[`quickTimeMetadataCameraISOSensitivity`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataCameraISOSensitivity)

A value of type kCMMetadataBaseDataType_UTF8 indicating the sensitivity of the camera to light in terms of ISO exposure index (e.g. “800”). See SMPTE RDD 18.

[`quickTimeMetadataCameraIdentifier`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataCameraIdentifier)

An identifier that represents the camera identifier in QuickTime.

[`quickTimeMetadataCameraLensIrisFNumber`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataCameraLensIrisFNumber)

A value of type kCMMetadataBaseDataType_UTF8 indicating measure of the amount of light transmitted through the lens. It is the focal length divided by the effective lens aperture diameter (e.g. “F2.8” or “2.8”).

[`quickTimeMetadataCameraLensModel`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataCameraLensModel)

A value of type kCMMetadataBaseDataType_UTF8 indicating the lens model (e.g. “iPhone 16 Pro back camera 6.765mm f/1.78”).

[`quickTimeMetadataCameraShutterSpeedAngle`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataCameraShutterSpeedAngle)

A value of type kCMMetadataBaseDataType_UTF8 indicating the exposure period expressed as an angle in minutes (1/60 degree) (e.g. “21600” or “360.00deg””).

[`quickTimeMetadataCameraShutterSpeedTime`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataCameraShutterSpeedTime)

A value of type kCMMetadataBaseDataType_UTF8 indicating the exposure period expressed as a time per one frame/field period in seconds.

[`quickTimeMetadataCameraWhiteBalance`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataCameraWhiteBalance)

A value of type kCMMetadataBaseDataType_UTF8 indicating the white balance value defined by the temperature in Kelvin units (e.g. “5500K” or “5500”). See SMPTE RDD 18.

[`quickTimeMetadataCinematicVideoIntent`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataCinematicVideoIntent)

A value of type `kCMMetadataBaseDataType_UInt8` indicating whether this movie is intended as a Cinematic Video (1) or not (0).

[`quickTimeMetadataCollectionUser`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataCollectionUser)

An identifier that represents a name that indicates a user-defined collection.

[`quickTimeMetadataComment`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataComment)

An identifier that represents a comment regarding the movie file content.

[`quickTimeMetadataComposer`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataComposer)

An identifier that represents the name of the composer of the movie file content.

[`quickTimeMetadataContentIdentifier`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataContentIdentifier)

An identifier that represents the content identifier in QuickTime.

[`quickTimeMetadataCopyright`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataCopyright)

An identifier that represents the copyright statement for the movie file content.

[`quickTimeMetadataCreationDate`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataCreationDate)

An identifier that represents the creation date of the movie file content.

[`quickTimeMetadataCredits`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataCredits)

An identifier that represents the credits of the movie source content.

[`quickTimeMetadataDescription`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataDescription)

An identifier that represents the description of the movie file content.

[`quickTimeMetadataDetectedCatBody`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataDetectedCatBody)

An identifier that represents a detected cat body in the movie file content.

[`quickTimeMetadataDetectedDogBody`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataDetectedDogBody)

An identifier that represents a detected dog body in the movie file content.

[`quickTimeMetadataDetectedFace`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataDetectedFace)

An identifier that represents a detected face in the movie file content.

[`quickTimeMetadataDetectedHumanBody`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataDetectedHumanBody)

An identifier that represents a detected human body in the movie file content.

[`quickTimeMetadataDetectedSalientObject`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataDetectedSalientObject)

An identifier that represents a detected salient object in the movie file content.

[`quickTimeMetadataDirectionFacing`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataDirectionFacing)

An identifier that represents the direction the camera is facing during the shot.

[`quickTimeMetadataDirectionMotion`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataDirectionMotion)

An identifier that represents the direction the camera is moving during the shot.

[`quickTimeMetadataDirector`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataDirector)

An identifier that represents the name of the director of the movie file content.

[`quickTimeMetadataDisplayName`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataDisplayName)

An identifier that represents the display name of the movie file content.

[`quickTimeMetadataEncodedBy`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataEncodedBy)

An identifier that represents the name of the person or organization responsible for encoding the movie file content.

[`quickTimeMetadataFullFrameRatePlaybackIntent`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataFullFrameRatePlaybackIntent)

An identifier that represents whether this movie should play at full frame rate.

[`quickTimeMetadataGenre`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataGenre)

An identifier that represents the genre or genres to which the movie content conforms.

[`quickTimeMetadataInformation`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataInformation)

An identifier that represents general information about the movie file content.

[`quickTimeMetadataIsMontage`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataIsMontage)

An identifier that represents that a movie is a montage of other media.

[`quickTimeMetadataKeywords`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataKeywords)

An identifier that represents the keywords for the movie file content.

[`quickTimeMetadataLivePhotoVitalityScore`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataLivePhotoVitalityScore)

An identifier that represents the vitality score of the Live Photo movie.

[`quickTimeMetadataLivePhotoVitalityScoringVersion`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataLivePhotoVitalityScoringVersion)

An identifier that represents the version of the algorithm responsible for scoring the Live Photo movie for vitality.

[`quickTimeMetadataLocationBody`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataLocationBody)

An identifier that represents the astronomical body for compatibility with the 3GPP format.

[`quickTimeMetadataLocationDate`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataLocationDate)

An identifier that represents a date and time using the extended format defined in ISO 8601:2004.

[`quickTimeMetadataLocationHorizontalAccuracyInMeters`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataLocationHorizontalAccuracyInMeters)

An identifier that represents the horizontal accuracy of the location data.

[`quickTimeMetadataLocationISO6709`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataLocationISO6709)

An identifier that represents the geographic point location by coordinates as defined in ISO 6709:2008.

[`quickTimeMetadataLocationName`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataLocationName)

An identifier that represents the name of the location.

[`quickTimeMetadataLocationNote`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataLocationNote)

An identifier that represents a descriptive comment about the location.

[`quickTimeMetadataLocationRole`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataLocationRole)

An identifier that represents the single byte describing the movie location.

[`quickTimeMetadataMake`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataMake)

An identifier that represents the name of the camera maker.

[`quickTimeMetadataModel`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataModel)

An identifier that represents the name of the camera model.

[`quickTimeMetadataOriginalArtist`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataOriginalArtist)

An identifier that represents the name of the original artist of the movie file content.

[`quickTimeMetadataPerformer`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataPerformer)

An identifier that represents the name of the performer in the movie file content.

[`quickTimeMetadataPhonogramRights`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataPhonogramRights)

An identifier that represents the phonogram rights statement.

[`quickTimeMetadataPreferredAffineTransform`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataPreferredAffineTransform)

An identifier that represents the affine transform preference for the movie file content.

[`quickTimeMetadataPresentationImmersiveMedia`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataPresentationImmersiveMedia)

A value of type kCMMetadataBaseDataType_RawData

[`quickTimeMetadataProducer`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataProducer)

An identifier that represents the name of the producer of the movie file content.

[`quickTimeMetadataPublisher`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataPublisher)

An identifier that represents the name of the publisher of the movie file content.

[`quickTimeMetadataRatingUser`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataRatingUser)

An identifier that represents the rating or relative value of the movie.

[`quickTimeMetadataSoftware`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataSoftware)

An identifier that represents the name of software used to create the movie file content.

[`quickTimeMetadataSpatialOverCaptureQualityScore`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataSpatialOverCaptureQualityScore)

An identifier that represents a score that indicates the quality of an asset.

[`quickTimeMetadataSpatialOverCaptureQualityScoringVersion`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataSpatialOverCaptureQualityScoringVersion)

An identifier that represents the version of the algorithm responsible for generating a score.

[`quickTimeMetadataTitle`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataTitle)

An identifier that represents the title of the movie file content.

[`quickTimeMetadataVideoOrientation`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataVideoOrientation)

An identifier that represents the orientation of the movie file content.

[`quickTimeMetadataWhiteBalanceByCCTColorMatrices`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataWhiteBalanceByCCTColorMatrices)

A value of type kCMMetadataBaseDataType_RawData indicating the reference color translation matrix data for ProRes RAW.

[`quickTimeMetadataWhiteBalanceByCCTWhiteBalanceFactors`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataWhiteBalanceByCCTWhiteBalanceFactors)

A value of type kCMMetadataBaseDataType_RawData indicating the reference white balance multiplication factor data for ProRes RAW.

[`quickTimeMetadataYear`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataYear)

An identifier that represents the recording year of the movie file content.

[`quickTimeMetadataiXML`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeMetadataiXML)

An identifier that represents iXML information for the movie file content.

### QuickTime user metadata identifiers

[`quickTimeUserDataAccessibilityDescription`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataAccessibilityDescription)

An identifier that represents the accessibility description for the movie file content.

[`quickTimeUserDataAlbum`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataAlbum)

An identifier that represents the name of the album or collection in QuickTime.

[`quickTimeUserDataArranger`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataArranger)

An identifier that represents the name of the arranger of the movie file content.

[`quickTimeUserDataArtist`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataArtist)

An identifier that represents the name of the artist of the movie file content.

[`quickTimeUserDataAuthor`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataAuthor)

An identifier that represents the name of the author of the movie file content.

[`quickTimeUserDataChapter`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataChapter)

An identifier that represents the name of the chapter.

[`quickTimeUserDataComment`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataComment)

An identifier that represents a comment regarding the movie file content.

[`quickTimeUserDataComposer`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataComposer)

An identifier that represents the name of the composer of the movie file content.

[`quickTimeUserDataCopyright`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataCopyright)

An identifier that represents the copyright statement in QuickTime.

[`quickTimeUserDataCreationDate`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataCreationDate)

An identifier that represents the creation date of the movie file content.

[`quickTimeUserDataCredits`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataCredits)

An identifier that represents the credits of movie source content.

[`quickTimeUserDataDescription`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataDescription)

An identifier that represents the description of the movie file content.

[`quickTimeUserDataDirector`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataDirector)

An identifier that represents the name of the director of the movie file content.

[`quickTimeUserDataDisclaimer`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataDisclaimer)

An identifier that represents the disclaimer regarding the movie file content.

[`quickTimeUserDataEncodedBy`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataEncodedBy)

An identifier that represents the name of the person or organization responsible for encoding the movie file content.

[`quickTimeUserDataFullName`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataFullName)

An identifier that represents the full name of the movie file content.

[`quickTimeUserDataGenre`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataGenre)

An identifier that represents the genre or genres to which the movie content conforms.

[`quickTimeUserDataHostComputer`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataHostComputer)

An identifier that represents the name of the host computer.

[`quickTimeUserDataInformation`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataInformation)

An identifier that represents general information about the movie file content.

[`quickTimeUserDataKeywords`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataKeywords)

An identifier that represents the keywords for the movie file content.

[`quickTimeUserDataLocationISO6709`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataLocationISO6709)

An identifier that represents the geographic point location by coordinates as defined in ISO 6709:2008.

[`quickTimeUserDataMake`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataMake)

An identifier that represents the name of the camera maker.

[`quickTimeUserDataModel`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataModel)

An identifier that represents the name of the camera model.

[`quickTimeUserDataOriginalArtist`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataOriginalArtist)

An identifier that represents the name of the original artist of the movie file content.

[`quickTimeUserDataOriginalFormat`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataOriginalFormat)

An identifier that represents the original format of the movie file content.

[`quickTimeUserDataOriginalSource`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataOriginalSource)

An identifier that represents the original source of the movie file content.

[`quickTimeUserDataPerformers`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataPerformers)

An identifier that represents the name of the performers in the movie file content.

[`quickTimeUserDataPhonogramRights`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataPhonogramRights)

An identifier that represents the phonogram rights statement.

[`quickTimeUserDataProducer`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataProducer)

An identifier that represents the name of the producer of the movie file content.

[`quickTimeUserDataProduct`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataProduct)

An identifier that represents the name of the product.

[`quickTimeUserDataPublisher`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataPublisher)

An identifier that represents the name of the publisher of the movie file content.

[`quickTimeUserDataSoftware`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataSoftware)

An identifier that represents the name of software used to create the movie file content.

[`quickTimeUserDataSpecialPlaybackRequirements`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataSpecialPlaybackRequirements)

An identifier that represents the special hardware and software requirements for playback.

[`quickTimeUserDataTaggedCharacteristic`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataTaggedCharacteristic)

An identifier that represents the tagged characteristic.

[`quickTimeUserDataTrackName`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataTrackName)

An identifier that represents the name of a track in the movie file content.

[`quickTimeUserDataTrack`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataTrack)

An identifier that represents a track in the movie file content.

[`quickTimeUserDataURLLink`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataURLLink)

An identifier that represents the webpage for the movie file content.

[`quickTimeUserDataWarning`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataWarning)

An identifier that represents the warning text for the movie file content.

[`quickTimeUserDataWriter`](/documentation/AVFoundation/AVMetadataIdentifier/quickTimeUserDataWriter)

An identifier that represents the name of the writer of the movie file content.

### ID3 metadata identifiers

[`id3MetadataAlbumSortOrder`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataAlbumSortOrder)

An identifier that represents how to sort the album.

[`id3MetadataAlbumTitle`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataAlbumTitle)

An identifier that represents the title of the recording.

[`id3MetadataAttachedPicture`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataAttachedPicture)

An identifier that represents an image relating to the audio file.

[`id3MetadataAudioEncryption`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataAudioEncryption)

An identifier that represents the encryption details of the audio stream.

[`id3MetadataAudioSeekPointIndex`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataAudioSeekPointIndex)

An identifier that represents the list of seek points within the audio file.

[`id3MetadataBand`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataBand)

An identifier that represents additional information about the performers in the recording.

[`id3MetadataBeatsPerMinute`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataBeatsPerMinute)

An identifier that represents the beats per minute of the audio.

[`id3MetadataComments`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataComments)

An identifier that represents additional text information for the media.

[`id3MetadataCommercial`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataCommercial)

An identifier that represents the commercial details for the media.

[`id3MetadataCommercialInformation`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataCommercialInformation)

An identifier that represents the webpage containing purchasing information.

[`id3MetadataComposer`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataComposer)

An identifier that represents the name of the composer.

[`id3MetadataConductor`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataConductor)

An identifier that represents the name of the conductor.

[`id3MetadataContentGroupDescription`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataContentGroupDescription)

An identifier that indicates the sound belongs to a larger category of sounds or music.

[`id3MetadataContentType`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataContentType)

An identifier that represents the media content type.

[`id3MetadataCopyright`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataCopyright)

An identifier that represents the copyright statement.

[`id3MetadataCopyrightInformation`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataCopyrightInformation)

An identifier that represents the webpage describing the terms of use and ownership.

[`id3MetadataDate`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataDate)

An identifier that represents the date for the recording.

[`id3MetadataEncodedBy`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataEncodedBy)

An identifier that represents the person or organization responsible for encoding the media.

[`id3MetadataEncodedWith`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataEncodedWith)

An identifier that represents the software or hardware and settings used for encoding.

[`id3MetadataEncodingTime`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataEncodingTime)

An identifier that represents the encoding time of the audio.

[`id3MetadataEncryption`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataEncryption)

An identifier that represents the encryption method used.

[`id3MetadataEqualization`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataEqualization)

An identifier that represents the equalization curve within the audio file.

[`id3MetadataEqualization2`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataEqualization2)

An identifier that represents the equalization curve within the audio file.

[`id3MetadataEventTimingCodes`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataEventTimingCodes)

An identifier that represents the timing codes used for synchronization with key events in a song or sound.

[`id3MetadataFileOwner`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataFileOwner)

An identifier that represents the name of the owner or licensee of the file and it’s contents.

[`id3MetadataFileType`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataFileType)

An identifier that represents the file type of the audio.

[`id3MetadataGeneralEncapsulatedObject`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataGeneralEncapsulatedObject)

An identifier that represents the details of a file.

[`id3MetadataGroupIdentifier`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataGroupIdentifier)

An identifier that represents the grouping of distinct frames.

[`id3MetadataInitialKey`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataInitialKey)

An identifier that represents the musical key in which the sound starts.

[`id3MetadataInternationalStandardRecordingCode`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataInternationalStandardRecordingCode)

An identifier that represents the international standard recording code.

[`id3MetadataInternetRadioStationName`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataInternetRadioStationName)

An identifier that represents the name of the internet radio station streaming the audio.

[`id3MetadataInternetRadioStationOwner`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataInternetRadioStationOwner)

An identifier that represents the name of the owner of the internet radio station streaming the audio.

[`id3MetadataInvolvedPeopleList_v23`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataInvolvedPeopleList_v23)

An identifier that represents the list of names of contributors to the media.

[`id3MetadataInvolvedPeopleList_v24`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataInvolvedPeopleList_v24)

An identifier that represents the list of names of contributors to the media.

[`id3MetadataLanguage`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataLanguage)

An identifier that represents the language of the text or lyrics spoken or sung in the audio.

[`id3MetadataLeadPerformer`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataLeadPerformer)

An identifier that represents the main artist of the recording.

[`id3MetadataLength`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataLength)

An identifier that represents the length of the audio file in milliseconds.

[`id3MetadataLink`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataLink)

An identifier that represents the link information from an ID3 tag that might reside in another audio file or alone in a binary file.

[`id3MetadataLyricist`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataLyricist)

An identifier that represents the writer(s) of the text or lyrics in the recording.

[`id3MetadataMediaType`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataMediaType)

An identifier that represents which media the sound originated from.

[`id3MetadataModifiedBy`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataModifiedBy)

An identifier that represents the people behind a remix and similar interpretations of another existing piece.

[`id3MetadataMood`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataMood)

An identifier that represents the mood of the audio.

[`id3MetadataMPEGLocationLookupTable`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataMPEGLocationLookupTable)

An identifier that represents the lookup table used to increase performance and accuracy of jumps within an MPEG audio file.

[`id3MetadataMusicCDIdentifier`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataMusicCDIdentifier)

An identifier that represents the ID used to identify the CD in databases such as the Compact Disc Database.

[`id3MetadataMusicianCreditsList`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataMusicianCreditsList)

An identifier that represents the mapping between an instrument and the musician that played it.

[`id3MetadataOfficialArtistWebpage`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataOfficialArtistWebpage)

An identifier that represents the artist’s official webpage.

[`id3MetadataOfficialAudioFileWebpage`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataOfficialAudioFileWebpage)

An identifier that represents the official webpage for the audio file.

[`id3MetadataOfficialAudioSourceWebpage`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataOfficialAudioSourceWebpage)

An identifier that represents the official webpage for the source of the audio file.

[`id3MetadataOfficialInternetRadioStationHomepage`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataOfficialInternetRadioStationHomepage)

An identifier that represents the official homepage of the internet radio station.

[`id3MetadataOfficialPublisherWebpage`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataOfficialPublisherWebpage)

An identifier that represents the official webpage for the publisher.

[`id3MetadataOriginalAlbumTitle`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataOriginalAlbumTitle)

An identifier that represents the title of the original recording or source of sound.

[`id3MetadataOriginalArtist`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataOriginalArtist)

An identifier that represents the performer(s) of the original recording.

[`id3MetadataOriginalFilename`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataOriginalFilename)

An identifier that represents the original filename for the recording.

[`id3MetadataOriginalLyricist`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataOriginalLyricist)

An identifier that represents the text writer(s) of the original recording.

[`id3MetadataOriginalReleaseTime`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataOriginalReleaseTime)

An identifier that represents the release time for the original recording.

[`id3MetadataOriginalReleaseYear`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataOriginalReleaseYear)

An identifier that represents the release year for the original recording.

[`id3MetadataOwnership`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataOwnership)

An identifier that represents the transaction details indicating proof of ownership if signed.

[`id3MetadataPartOfASet`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataPartOfASet)

An identifier that represents the part of a set the audio came from.

[`id3MetadataPayment`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataPayment)

An identifier that represents the webpage that handles the process of paying for the audio file.

[`id3MetadataPerformerSortOrder`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataPerformerSortOrder)

An identifier that represents the performer sort order.

[`id3MetadataPlayCounter`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataPlayCounter)

An identifier that represents the play count of the audio file.

[`id3MetadataPlaylistDelay`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataPlaylistDelay)

An identifier that represents the number of milliseconds of silence between every song in a playlist.

[`id3MetadataPopularimeter`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataPopularimeter)

An identifier that represents the rating for the audio file.

[`id3MetadataPositionSynchronization`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataPositionSynchronization)

An identifier that represents the time offset of the first frame in the stream.

[`id3MetadataPrivate`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataPrivate)

An identifier that represents the information from a software producer that its program uses.

[`id3MetadataProducedNotice`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataProducedNotice)

An identifier that represents the produced notice.

[`id3MetadataPublisher`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataPublisher)

An identifier that represents the name of the label or publisher.

[`id3MetadataRecommendedBufferSize`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataRecommendedBufferSize)

An identifier that represents the buffer size the server recommends.

[`id3MetadataRecordingDates`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataRecordingDates)

An identifier that represents additional recording dates that complement year, date, and time identifiers.

[`id3MetadataRecordingTime`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataRecordingTime)

An identifier that represents the recording time.

[`id3MetadataRelativeVolumeAdjustment`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataRelativeVolumeAdjustment)

An identifier that represents the increase or decrease of volume on each channel while the file plays.

[`id3MetadataRelativeVolumeAdjustment2`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataRelativeVolumeAdjustment2)

An identifier that represents the increase or decrease of volume on each channel while the file plays.

[`id3MetadataReleaseTime`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataReleaseTime)

An identifier that represents the time of the first release.

[`id3MetadataReverb`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataReverb)

An identifier that represents the adjustments to echoes of different kinds.

[`id3MetadataSeek`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataSeek)

An identifier that represents the location of other tags in a file or stream.

[`id3MetadataSetSubtitle`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataSetSubtitle)

An identifier that represents the set subtitle the track belongs to.

[`id3MetadataSignature`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataSignature)

An identifier that represents the group of frames to sign.

[`id3MetadataSize`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataSize)

An identifier that represents the size of the audio file in bytes.

[`id3MetadataSubTitle`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataSubTitle)

An identifier that represents the information relating to the contents title.

[`id3MetadataSynchronizedLyric`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataSynchronizedLyric)

An identifier that represents the words in the audio file as text in sync with the audio.

[`id3MetadataSynchronizedTempoCodes`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataSynchronizedTempoCodes)

An identifier that represents the tempo codes used for a more accurate description of the tempo of a musical piece.

[`id3MetadataTaggingTime`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataTaggingTime)

An identifier that represents the time of tagging.

[`id3MetadataTermsOfUse`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataTermsOfUse)

An identifier that represents the brief description of the terms of use and ownership of the file.

[`id3MetadataTime`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataTime)

An identifier that represents the time for the recording.

[`id3MetadataTitleDescription`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataTitleDescription)

An identifier that represents the name of the piece.

[`id3MetadataTitleSortOrder`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataTitleSortOrder)

An identifier that represents the title sort order.

[`id3MetadataTrackNumber`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataTrackNumber)

An identifier that represents the order number of the audio file.

[`id3MetadataUniqueFileIdentifier`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataUniqueFileIdentifier)

An identifier that represents the identifier used to indicate the audio file in a database.

[`id3MetadataUnsynchronizedLyric`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataUnsynchronizedLyric)

An identifier that represents the lyrics of the song or a text transcription of other vocal activities.

[`id3MetadataUserText`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataUserText)

An identifier that represents the user text information frame.

[`id3MetadataUserURL`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataUserURL)

An identifier that represents the user webpage frame.

[`id3MetadataYear`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataYear)

An identifier that represents the year of the recording.

[`id3MetadataCommerical`](/documentation/AVFoundation/AVMetadataIdentifier/id3MetadataCommerical)

An identifier that represents the commerical frame.

### 3GP user metadata identifiers

[`identifier3GPUserDataAlbumAndTrack`](/documentation/AVFoundation/AVMetadataIdentifier/identifier3GPUserDataAlbumAndTrack)

An identifier that represents the text for the album and track titles.

[`identifier3GPUserDataAuthor`](/documentation/AVFoundation/AVMetadataIdentifier/identifier3GPUserDataAuthor)

An identifier that represents the author of the media.

[`identifier3GPUserDataCollection`](/documentation/AVFoundation/AVMetadataIdentifier/identifier3GPUserDataCollection)

An identifier that represents the collection name for the media.

[`identifier3GPUserDataCopyright`](/documentation/AVFoundation/AVMetadataIdentifier/identifier3GPUserDataCopyright)

An identifier that represents the copyright statement.

[`identifier3GPUserDataDescription`](/documentation/AVFoundation/AVMetadataIdentifier/identifier3GPUserDataDescription)

An identifier that represents the description for the media.

[`identifier3GPUserDataGenre`](/documentation/AVFoundation/AVMetadataIdentifier/identifier3GPUserDataGenre)

An identifier that represents the genre of the media.

[`identifier3GPUserDataKeywordList`](/documentation/AVFoundation/AVMetadataIdentifier/identifier3GPUserDataKeywordList)

An identifier that represents the list of keywords for the media.

[`identifier3GPUserDataLocation`](/documentation/AVFoundation/AVMetadataIdentifier/identifier3GPUserDataLocation)

An identifier that represents the location information for the media.

[`identifier3GPUserDataMediaClassification`](/documentation/AVFoundation/AVMetadataIdentifier/identifier3GPUserDataMediaClassification)

An identifier that represents the classification of the media content.

[`identifier3GPUserDataMediaRating`](/documentation/AVFoundation/AVMetadataIdentifier/identifier3GPUserDataMediaRating)

An identifier that represents the rating of the media content.

[`identifier3GPUserDataPerformer`](/documentation/AVFoundation/AVMetadataIdentifier/identifier3GPUserDataPerformer)

An identifier that represents information about the performer.

[`identifier3GPUserDataRecordingYear`](/documentation/AVFoundation/AVMetadataIdentifier/identifier3GPUserDataRecordingYear)

An identifier that represents the recording year for the media.

[`identifier3GPUserDataThumbnail`](/documentation/AVFoundation/AVMetadataIdentifier/identifier3GPUserDataThumbnail)

An identifier that represents the media thumbnail.

[`identifier3GPUserDataTitle`](/documentation/AVFoundation/AVMetadataIdentifier/identifier3GPUserDataTitle)

An identifier that represents the title for the media.

[`identifier3GPUserDataUserRating`](/documentation/AVFoundation/AVMetadataIdentifier/identifier3GPUserDataUserRating)

An identifier that represents the user rating.

### ISO metadata identifiers

[`isoUserDataAccessibilityDescription`](/documentation/AVFoundation/AVMetadataIdentifier/isoUserDataAccessibilityDescription)

An identifier that represents the accessibility description for the media content.

[`isoUserDataCopyright`](/documentation/AVFoundation/AVMetadataIdentifier/isoUserDataCopyright)

An identifier that represents the copyright statement.

[`isoUserDataDate`](/documentation/AVFoundation/AVMetadataIdentifier/isoUserDataDate)

An identifier that represents the date for the media content.

[`isoUserDataTaggedCharacteristic`](/documentation/AVFoundation/AVMetadataIdentifier/isoUserDataTaggedCharacteristic)

An identifier that represents the tagged media characteristic used for identifying accessibility features.

### ICY metadata identifiers

[`icyMetadataStreamTitle`](/documentation/AVFoundation/AVMetadataIdentifier/icyMetadataStreamTitle)

An identifier that represents the title of a stream.

[`icyMetadataStreamURL`](/documentation/AVFoundation/AVMetadataIdentifier/icyMetadataStreamURL)

An identifier that represents the web address of a stream.

### Initializers

[`init(_:)`](/documentation/AVFoundation/AVMetadataIdentifier/init(_:))

Creates a metadata identifier.

[`init(rawValue:)`](/documentation/AVFoundation/AVMetadataIdentifier/init(rawValue:))

Creates a metadata identifier with the specified raw value.


---

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